original description
Bickel, D. (1976). Two new species of non-marine Mollusca from the Fort Union Group (Paleocene) of North Dakota and Montana. <em>The Nautilus.</em> 90(3): 94-98., available online at https://www.biodiversitylibrary.org/page/8276464
page(s): 95-97, figs 1-4 [details]
From editor or global species database
Type locality SW 1/4, NW 1/4, sec. 28, T. 148 N., R. 100 W., McKenzie County, North Dakota, United States [details]